Hello, I was wondering if there was a way to make it so that every member that joins must make a post in a Introduction thread in order to unlock the rest of the forums.

I know that it could be done manually(wait for them to post, then activate them in another group etc.); however I was wondering if there was a more easier way to do this. It's similar to how on this forum, you need a certain amount of posts before being able to PM another member etc.. but instead you'd need to make a post first and the system will automatically unlock the rest for you.

I appreciate your time in reading this, and am grateful if you're able to help me out!

How about a autosubscribe group? Users with one or more post get added to the group. Then that group has the permission to view all other forums.